diff --git a/src/config.ts b/src/config.ts
index 2395249f..aec790a9 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -10,7 +10,7 @@ import { LinkPreset } from "./types/config";
 export const siteConfig: SiteConfig = {
 	title: "Fuwari",
 	subtitle: "Demo Site",
-	lang: "en", // 'en', 'zh_CN', 'zh_TW', 'ja', 'ko', 'es', 'th', 'vi', 'id'
+	lang: "en", // Language code, e.g. 'en', 'zh-CN', 'ja', etc.
 	themeColor: {
 		hue: 250, // Default hue for the theme color, from 0 to 360. e.g. red: 0, teal: 200, cyan: 250, pink: 345
 		fixed: false, // Hide the theme color picker for visitors
diff --git a/src/types/config.ts b/src/types/config.ts
index d7c7409d..c2c6a615 100644
--- a/src/types/config.ts
+++ b/src/types/config.ts
@@ -4,7 +4,17 @@ export type SiteConfig = {
 	title: string;
 	subtitle: string;
 
-	lang: "en" | "zh_CN" | "zh_TW" | "ja" | "ko" | "es" | "th" | "vi" | "tr";
+	lang:
+		| "en"
+		| "zh_CN"
+		| "zh_TW"
+		| "ja"
+		| "ko"
+		| "es"
+		| "th"
+		| "vi"
+		| "tr"
+		| "id";
 
 	themeColor: {
 		hue: number;